含 2.0% SO2 + 5.0% O2 的大气中铁硅合金的高温氧化作用

IF 1.9 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

steel research international Pub Date : 2024-09-15 DOI:10.1002/srin.202400547

Guangming Cao, Wentao Song, Hengxiang Yu, Yongcheng Bi, Zhenyu Liu

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引用次数: 0

摘要

在 900-1200 °C 的温度范围内，将鳞片置于含 2.0% SO2 + 5.0% O2 的大气中 60 分钟后，对鳞片的微观结构和成分进行了检测。氧化后鳞片的成分主要随温度而变化，而不是随硅含量而变化。FeS 的熔化温度为 950 ℃，而 FeSi2O4 的熔化温度为 1150 ℃。提出了两种 FeS 形成机制。熔融 FeS 在随后的冷却过程中发生共晶转变，形成片状 FeS + Fe-S-O 化合物。在 1150 °C以上，Fe2SiO4熔体进一步提高了铁的扩散速率。这种涉及 FeS 和 Fe2SiO4 的双重液化机制解释了在暴露于含硫大气中的铁硅合金中观察到的异常氧化增量。

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High‐Temperature Oxidation of Fe–Si Alloys in Atmospheres Containing 2.0% SO2 + 5.0% O2

The microstructure and composition of the scales formed are examined after being exposed to atmosphere containing 2.0% SO2 + 5.0% O2 for 60 min in the temperature range of 900–1200 °C. The composition of the scale post‐oxidation primarily varies with temperature rather than silicon content. FeS exhibits a melting temperature of 950 °C, whereas FeSi2O4 melts at 1150 °C. Two mechanisms for FeS formation are proposed. Eutectoid transformation of molten FeS occurs during subsequent cooling, resulting in lamellar FeS + Fe–S–O compounds. Above 1150 °C, the melt of Fe2SiO4 further increases the Fe diffusion rate. This dual‐liquefaction mechanism involving FeS and Fe2SiO4 accounts for the anomalous oxidative mass gain observed in Fe–Si alloys exposed to a sulfur‐containing atmosphere.

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来源期刊

steel research international 工程技术-冶金工程

CiteScore

3.30

自引率

18.20%

发文量

319

审稿时长

1.9 months

期刊介绍： steel research international is a journal providing a forum for the publication of high-quality manuscripts in areas ranging from process metallurgy and metal forming to materials engineering as well as process control and testing. The emphasis is on steel and on materials involved in steelmaking and the processing of steel, such as refractories and slags. steel research international welcomes manuscripts describing basic scientific research as well as industrial research. The journal received a further increased, record-high Impact Factor of 1.522 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). The journal was formerly well known as "Archiv für das Eisenhüttenwesen" and "steel research"; with effect from January 1, 2006, the former "Scandinavian Journal of Metallurgy" merged with Steel Research International. Hot Topics: -Steels for Automotive Applications -High-strength Steels -Sustainable steelmaking -Interstitially Alloyed Steels -Electromagnetic Processing of Metals -High Speed Forming